Set CWD of desktop environment to CWD of notebook

Otherwise it'll be cwd of webroot, which is confusing as
soon as you open a terminal

jupyter_desktop/__init__.py

@@ -1,4 +1,5 @@
 import os
+import shlex
 import tempfile
 
 
@@ -9,14 +10,8 @@ def setup_desktop():
     # This is only readable, writeable & searchable by our uid
     sockets_dir = tempfile.mkdtemp()
     sockets_path = os.path.join(sockets_dir, 'vnc-socket')
-    return {
+
-        'command': [
+    vnc_command = ' '.join((shlex.quote(p) for p in [
-            'websockify', '-v',
-            '--web', os.path.join(HERE, 'share/web/noVNC-1.1.0'),
-            '--heartbeat', '30',
-            '5901',
-            '--unix-target', sockets_path,
-            '--',
         os.path.join(HERE, 'share/tigervnc/bin/vncserver'),
         '-verbose',
         '-xstartup', os.path.join(HERE, 'share/xstartup'),
@@ -25,6 +20,17 @@ def setup_desktop():
         '-rfbunixpath', sockets_path,
         '-fg',
         ':1',
+    ]))
+    return {
+        'command': [
+            'websockify', '-v',
+            '--web', os.path.join(HERE, 'share/web/noVNC-1.1.0'),
+            '--heartbeat', '30',
+            '5901',
+            '--unix-target', sockets_path,
+            '--',
+            '/bin/sh', '-c',
+            f'cd {os.getcwd()} && {vnc_command}'
         ],
         'port': 5901,
         'timeout': 30,